65773421 has 16 divisors (see below), whose sum is σ = 81859200. Its totient is φ = 51565248.

The previous prime is 65773417. The next prime is 65773429. The reversal of 65773421 is 12437756.

It is not a de Polignac number, because 65773421 - 2² = 65773417 is a prime.

It is a super-2 number, since 2×65773421² = 8652285820086482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65773429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4670 + ... + 12383.

It is an arithmetic number, because the mean of its divisors is an integer number (5116200).

Almost surely, 2^65773421 is an apocalyptic number.

It is an amenable number.

65773421 is a deficient number, since it is larger than the sum of its proper divisors (16085779).

65773421 is a wasteful number, since it uses less digits than its factorization.

65773421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17108.

The product of its digits is 35280, while the sum is 35.

The square root of 65773421 is about 8110.0814422544. The cubic root of 65773421 is about 403.6610172386.

The spelling of 65773421 in words is "sixty-five million, seven hundred seventy-three thousand, four hundred twenty-one".